Investigating the neurophysiology of the human BOLD fMRI signal during a visual attention task with simultaneously recorded EEG and fMRI

Scheeringa, René; Oostenveld, Robert; Km, Petersson; Grothe, Iris; Norris, DG; Hagoort, Peter; Bastiaansen, Marcel C. M.

doi:10.1016/s1053-8119(09)71721-5

Cited by 2 publications

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“…It has been well established that alpha-band oscillatory activity over occipito-parietal sites desynchronises during focussed attention and predicts performance on perceptual discrimination and detection tasks (Babiloni et al, 2006;Ergenoglu et al, 2004;Hanslmayr et al, 2007;Kelly & O'Connell, 2013;Kelly et al, 2006Kelly et al, , 2009Linkenkaer-Hansen et al, 2004;O'Connell et al, 2009;van Dijk et al, 2008). This desynchronisation of alpha activity has been linked with activity in the dorsal attention network (Laufs et al, 2003(Laufs et al, , 2006Mantini et al, 2007;Sadaghiani et al, 2010;Scheeringa et al, 2009), and is thought to arise from the increased excitability in task-relevant processing regions and the suppression of task-irrelevant activity (Jensen & Mazaheri, 2010;Romei et al, 2008;Thut & Miniussi, 2009;Van Diepen et al, 2019). In a post-hoc analysis, we tested for greater task engagement in the neutral cue condition by measuring alpha-band oscillatory activity over a central occipito-parietal site in the pre-evidence window -410:-70 ms (Figure 6).…”

Section: The Effect Of the Cue On Stimulus Engagementmentioning

confidence: 99%

Prior probability cues bias sensory encoding with increasing task exposure

Walsh

McGovern

Dully

et al. 2023

Preprint

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When observers have prior knowledge about the likely outcome of their perceptual decisions, they exhibit robust behavioural biases in reaction time and choice accuracy. Computational modelling typically attributes these effects to strategic adjustments in the criterion amount of evidence required to commit to a choice alternative - usually implemented by a starting point shift - but recent work suggests that expectations may also fundamentally bias the encoding of the sensory evidence itself. Here, we recorded neural activity with EEG while participants performed a contrast discrimination task with valid, invalid, or neutral probabilistic cues across multiple testing sessions. We measured sensory evidence encoding via contrast-dependent steady-state visual-evoked potentials (SSVEP), while a read-out of criterion adjustments was provided by effector-selective mu/beta band activity over motor cortex. In keeping with prior modelling and neural recording studies, cues evoked substantial biases in motor preparation consistent with criterion adjustments, but we additionally found that the cues produced a significant modulation of the SSVEP during evidence presentation. While motor preparation adjustments were observed in the first testing session, the sensory-level effects only emerged with extended task exposure. Our results suggest that, in addition to strategic adjustments to the decision process, probabilistic information can also induce subtle biases in the encoding of the evidence itself.

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Section: The Effect Of the Cue On Stimulus Engagementmentioning

confidence: 99%

Prior probability cues bias sensory encoding with increasing task exposure

Walsh

McGovern

Dully

et al. 2023

Preprint

View full text Add to dashboard Cite

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“…Alpha oscillations (8-12 Hz) are thought to reflect a mechanism of active inhibition, which fine-tunes sensory processing by guiding attention and suppressing distracting input (Jensen & Mazaheri, 2010;Klimesch et al, 2007). Alpha power increases with working memory load during retention, reflecting inhibition of task-irrelevant regions (Jensen et al, 2002;Pan et al, 2018;Scheeringa et al, 2009;Tuladhar et al, 2007), and is associated with behavioural performance (Haegens et al, 2010(Haegens et al, , 2012. Traditionally, beta oscillations (15-30 Hz) are considered a motor rhythm (Kilavik et al, 2013), associated with top-down processing and long-distance network communication (Varela et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Naturalistic language comprehension is supported by alpha and beta oscillations linked to domain-general inhibition and reactivation

Zioga

Weissbart

Lewis

et al. 2022

Preprint

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Brain oscillations are prevalent in all species and are involved in numerous perceptual operations. Alpha oscillations are thought to facilitate processing through the inhibition of task-irrelevant networks, while beta oscillations are linked to the reactivation of content representations. Can the proposed functional role of alpha and beta oscillations be generalized from low-level operations to higher-level cognitive processes? Here we address this question focusing on naturalistic spoken language processing. Twenty-two (18 female) Dutch native speakers listened to stories in spoken Dutch and French while magnetoencephalography (MEG) was recorded. We used dependency parsing to identify three dependency states at each word, as the number of (1) newly opened dependencies, (2) dependencies that remained open, and (3) resolved dependencies. We then constructed linear forward models to predict alpha and beta power from the dependency features. Results showed that dependency features predict alpha and beta power in language-related regions beyond low-level linguistic features. Left temporal, fundamental language regions are involved in language comprehension in the alpha band, while frontal and parietal, higher-order language regions, and motor regions are mostly involved in the beta band. Critically, alpha and beta band dynamics seem to subserve language comprehension tapping into syntactic structure building and semantic composition by providing low-level mechanistic operations for inhibition and reactivation processes. Overall, this study sheds light on the role of alpha and beta oscillations during naturalistic language processing, providing evidence for the generalizability of these dynamics from perceptual to complex linguistic processes.

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Investigating the neurophysiology of the human BOLD fMRI signal during a visual attention task with simultaneously recorded EEG and fMRI

Cited by 2 publications

References 0 publications

Prior probability cues bias sensory encoding with increasing task exposure

Prior probability cues bias sensory encoding with increasing task exposure

Naturalistic language comprehension is supported by alpha and beta oscillations linked to domain-general inhibition and reactivation

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